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Strengthening austenitic steels by using nanotwinned austenitic grains
Scripta Materialia, 2012Abstract A novel strategy for strengthening austenite steels is introduced by using the unique strengthening effect of nanoscale twins. Austenite grains containing multiple nanoscale twins can be strengthened to a yield strength of a few GPa with very high work-hardening rates.
K. Lu, F.K. Yan, H.T. Wang, N.R. Tao
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Austenite grain growth in alumina-forming austenitic steel
Journal of Materials Research, 2016Abstract
Qiuzhi Gao +3 more
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Grain boundary strengthening in austenitic nitrogen steels
Materials Science and Engineering: A, 1999The effect of nitrogen and carbon on the strengthening of the austenitic steel Cr18Ni16Mn10 by grain boundaries is studied. It is established in accordance with previous results that contrary to carbon nitrogen increases the coefficient k in the Hall-Petch equation markedly.
Valentin Gavriljuk +5 more
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Strengthening an austenitic Fe–Mn steel using nanotwinned austenitic grains
Acta Materialia, 2012An austenitic Fe-25Mn steel with a low stacking fault energy was subjected to dynamic plastic deformation (DPD) followed by thermal annealing. The as-DPD sample is structurally characterized by a mixed nanostructure consisting of nanosized grains with an average size of 43 nm and bundles of nanoscale twins (with an average twin/matrix lamella thickness
H.T. Wang, N.R. Tao, K. Lu
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Tensile ductility of nanotwinned austenitic grains in an austenitic steel
Scripta Materialia, 2014Dynamic plastic deformation followed by recovery annealing of an austenitic stainless steel results in the formation of a hierarchical microstructure consisting of nanotwinned austenitic grains (>55 vol.%) mixed with nanograins and dislocation structures.
F.K. Yan, N.R. Tao, K. Lu
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Grain-Boundary Characteristics in Austenitic Steel
Proceedings, annual meeting, Electron Microscopy Society of America, 1996Grain boundaries are an active area of research interest due to their effect on material property and structure relationships. In order to discuss material properties with regard to grain boundaries it is necessary to know the boundary type. The optimum technique for performing this task is Electron Backscatter Diflfraction (EBSD) in concert with the ...
M.D. Caul, V. Randle
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Austenite grain coarsening in microalloyed steels
Metallurgical Transactions A, 1983A uniform, fine-grain structure is essential in steels, particularly for strip and plate, that are to meet demands for high strength and toughness. To produce such microstructures, every step of the high-temperature processing of the steel must be carefully controlled, beginning with grain coarsening that occurs during reheating for slab rolling ...
L. J. Cuddy, J. C. Raley
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Austenite grain growth in structural steel
Metal Science and Heat Treatment, 19721. The first period of austenite grain growth in steel 12Kh2N4A at 900\dgC (holding for 2 h or longer) is characterized by the formation of very large grains (grade 2\2-3) among fine grains (grade 9\2-10). The large grains are formed by the coalescence of fine grains into a single grain. 2. At higher temperatures there is less difference
S. V. Zagulyaeva, M. I. Vinograd
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JOM, 1987
This paper attempts to find a suitable technique for determining prior austenite grain size in mild steel such that it could be used over as wide a range of compositions and temperatures as possible. An effort is also made to trace the reasons behind the failure of any particular technique when applied beyond a specific temperature and composition ...
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This paper attempts to find a suitable technique for determining prior austenite grain size in mild steel such that it could be used over as wide a range of compositions and temperatures as possible. An effort is also made to trace the reasons behind the failure of any particular technique when applied beyond a specific temperature and composition ...
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Prediction of austenite grain growth during austenitization of low alloy steels
Materials & Design, 2008Although the prior austenite grain size (AGS) of heat treatable low alloy steels is an influential factor in phase transformations during quenching and in mechanical properties, there are few equations to predict the AGS considering alloying element effects.
Seok-Jae Lee, Young-Kook Lee
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